Electrolytic reduction of Mo and W as lighter homologues of seaborgium (Sg)

Toyoshima, Atsushi; Miyashita, Sunao; Oe, Kazuhiro; Asai, Masato  ; Sato, Tetsuya   ; Tsukada, Kazuaki  ; Kitatsuji, Yoshihiro  ; Nagame, Yuichiro ; Schdel, M.; Omtvedt, J. P.*; Kratz, J. V.*; Haba, Hiromitsu*; Kasamatsu, Yoshitaka*; Shinohara, Atsushi*; Wada, Ayaka*; Akiyama, Kazuhiko*; Oura, Yasuji*; Yokoyama, Akihiko*; Sueki, Keisuke*

We plan to determine the redox potential of seaborgium (Sg) in continuous experiments with a flow electrolytic column and a continuous solvent extraction SISAK. In this study, reduction experiments of its lighter homologues, Mo and W, were performed using the flow electrolytic column apparatus. After 200 L of the W radiotracer in 0.1 M HCl was introduced into the apparatus, 1000 L of 0.1 M HCl was fed into the electrode on which an potential was applied between -0.8 and 0.6 V. 1000 L was taken from the effluent from the electrode and was then mixed with 10 M hinokitiol in toluene with the same volume. After shaking for 1 min and then centrifuging for 30 s, 800 L was taken from each phase, which was then separately subjected to -ray spectrometry. As a result, the extraction yield of W was constant against the variation of the applied potential. It seems that once reduced W was again oxidized to the +6 state in the extraction procedure.